Improvement in hammer-straps



W J LEWIS Carriage Iron.

Patented Oct. '4, 187 0.

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iv a! WITIQEssESZ ritnftrdfitatrz WILLIAMJ. LEWIS, or PITTSBURG, PENNSYLVANIA.

Letters PatentNo. 107,929, dated October 4, 1870.

IMPROVEMENT IN HAMMER-STRAPS.

The Schedule referred to in these Letters Patent and making of the same.

To all whomxt't may concern Be it 'known that I, WILLIAM J .LEWIS, of Pittsburg, in the county of Allegheny and State of Penn-, sylvania, have invented a new and useful Improvement in Hammer-Strap; and I do hereby declare the following to be a full, clear, and cx'act description thereof, reference being had to the accompanying drawing making a part of this-specification, in whichr Figure 1 is a perspective view of the rolled plate or bar from which my improved hammer-strap is made, and i Figure 2 is a like view of the finished strap.

- Hammer-straps for holding in place the double-trees or single-trees of wagons, carriages, 8m, have here-' tofore commonly been madefrorn flat bar-iron of uni.- form thickness. By my improvement, I produce from rolled ribbed iron, arolled ribbed hammer-strap, of improved form, and at a much less price than they can be made for by forging from a flat bar.

.To enable others skilled in the art to'make and use myinvention, I will proceed to describe its constructio i 1 The bar A is rolled in grooved-cylindrical rolls, to the form substantially as shown, that is, with a rib, a, on its upperface, or, what'is mechanically the same,

with a body comparatively thick along the middle and edge.

thinning'down each way therefrom to or toward each Such a bar ,I out up into blanks B, of suitable lengths, punchthrough the rib, in oneend, a .bolt or staple-hole, c, and in the other end a hole, 0', for the hammer.

The thin edges of the blank are trimmed at intervals, so as to give any desired form or configuration to the strap. The rib or thickened body It gives it the required strength, and also prevents the too rapid wear of the-hammer and bolt on the sides of the holes 0 0' next the ends. l

After the blanks are trimmed and punched, theyv are bent to the form required, as illustrated in fig. 2,

either between dies or onthe anvil. What I claim as my invention, and by Letters Patent, isv A rolled ribbed hammer-strap, made substantially desire to secure as described.

In testimony whereof .I, the said WILLIAM J. Lnwrs, have hereunto set my hand.

' WM. J. LEWIS.

Witnesses i J OH GLENN, Tnos. B. KERR. 

